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:root{--bg:#fff;--surface:#fff;--soft:#f7f5f3;--ink:#1c2429;--muted:#72777b;--line:#e7e5e3;--accent:#e85a3a;--accent2:#ce7a6b;--shadow:0 16px 40px rgba(30,25,20,.05);--nav:rgba(255,255,255,.94)}
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.codex-intro{display:grid;grid-template-columns:1fr 240px;gap:50px;align-items:center}.codex-art{height:240px;background:linear-gradient(145deg,#fff,var(--soft));border-radius:8px;box-shadow:0 20px 50px rgba(35,45,60,.12)}.chapter-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.chapter{border:1px solid var(--line);padding:20px;min-height:130px}.chapter-num{display:inline-grid;place-items:center;width:36px;height:36px;border-radius:50%;color:#2971c9;background:#eef6ff;margin-right:12px}.chapter h3{display:inline}.docs-layout{display:grid;grid-template-columns:260px 1fr 200px;gap:28px}.docs-side{border-right:1px solid var(--line);padding-right:25px}.docs-side h3{margin-top:28px}.docs-side a{display:block;padding:4px 0;color:var(--muted)}.docs-side a.active{color:var(--accent)}.docs-main h1{font-size:48px}.docs-main h2{font-size:34px;margin-top:42px}.docs-main code{color:var(--accent)}.toc{position:sticky;top:85px;height:max-content}.toc a{display:block;padding:8px 0;border-bottom:1px solid var(--line)}.architecture{max-width:100%;margin-top:25px}.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.contact-layout,.about-layout{display:grid;grid-template-columns:1fr 310px;gap:18px}.contact-box{border:1px solid var(--line);padding:28px}.qr-panel{text-align:center;background:var(--soft);padding:25px}.qr-panel img{width:min(320px,100%);height:auto;border-radius:12px}.related a{display:block;background:var(--soft);padding:15px;margin-bottom:10px}.about-main h2{font-size:36px}.about-main h3{font-size:24px}.quote{background:var(--soft);border-left:4px solid var(--accent);padding:28px;margin-top:45px}.timeline-row{display:grid;grid-template-columns:60px 1fr;gap:15px;margin:15px 0}.timeline-row strong{color:var(--accent)}
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@media(max-width:760px){.site-header{height:auto}.nav-wrap{flex-wrap:wrap;height:auto;min-height:54px}.mobile-toggle{display:block;margin-left:auto}.tools{margin-left:0}.main-nav{display:none;order:4;width:100%;flex-direction:column;align-items:flex-start;padding:12px 0 18px}.main-nav.open{display:flex}.tools{gap:12px}.nav-visibility-toggle{top:62px}.hero-home{min-height:auto;padding-top:70px}.xmark{font-size:120px}.hero-home h1{font-size:40px}.feature-grid,.cards,.service-grid,.featured-models{grid-template-columns:1fr}.page-hero h1{font-size:46px}.stats{grid-template-columns:repeat(2,1fr)}.skill-grid,.model-grid{grid-template-columns:1fr}.chapter-grid{grid-template-columns:1fr}.codex-intro,.contact-layout,.about-layout{grid-template-columns:1fr}.codex-art{display:none}.docs-layout{grid-template-columns:1fr}.docs-side{border:0;border-bottom:1px solid var(--line);padding-bottom:20px}.wall-grid{grid-template-columns:1fr}.masonry{columns:1}.footer-row{flex-direction:column}.page-hero{padding-top:55px}.start-modal{padding:26px 20px}.start-modal h2{font-size:25px}.start-options{grid-template-columns:1fr}.start-option{min-height:190px}.api-example-notice{flex-direction:column;gap:5px}}
.qr-placeholder{width:min(280px,100%);aspect-ratio:1;margin:16px auto;display:grid;place-items:center;border:16px solid var(--ink);background:repeating-conic-gradient(var(--ink) 0 25%,var(--surface) 0 50%) 0/28px 28px;box-shadow:inset 0 0 0 18px var(--surface)}.qr-placeholder span{display:grid;place-items:center;width:92px;height:92px;background:var(--surface);border:8px solid var(--ink);font:700 34px Georgia,serif;color:var(--ink)}